Journal Article

Functional occlusion after fixed appliance orthodontic treatment: a UK three-centre study

A Milosevic and RHA Samuels

in The European Journal of Orthodontics

Published on behalf of European Orthodontics Society

Volume 20, issue 5, pages 561-568
Published in print October 1998 | ISSN: 0141-5387
Published online October 1998 | e-ISSN: 1460-2210 | DOI:
Functional occlusion after fixed appliance orthodontic treatment: a UK three-centre study

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This study aimed to assess the prevalence of functional occlusal contacts in cases treated to a Class I incisor relationship by upper and lower fixed appliance therapy. Helkimo's dysfunction indices were used by one examiner to assess mandibular mobility, clinical dysfunction and occlusal status. One-hundred-and-eighty-eight subjects participated in three UK orthodontic centres; Cardiff, Newport and Liverpool.

The results show that RCP (CR)-ICP (CO) discrepancies occurred in 33 (18 per cent) cases, non-working side contacts were present in 31 per cent and posterior contacts on protrusion occurred in 44 (23 per cent) subjects. These interferences were significantly more frequent in cases treated by postgraduate students compared with those treated by staff clinicians (P < 0.05). An overbite greater than 2.4 mm resulted in a highly significant reduction in the occurrence of non-working side contacts and posterior protrusive contacts (P < 0.001). The prevalence of functional occlusal discrepancies in this UK sample of orthodontic cases is similar to that reported in the American literature.

Journal Article.  0 words. 

Subjects: Restorative Dentistry and Orthodontics

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